Duplicating



Novo 29, 1927. 1,650,868

D. GESTETNER DUPLIcATING Fi1ed Dec. 17, 1926 ITED STATES PATENT oFFICE,

A lication file(1 IIecembe! 17, 1926, Seria1 To. 155,515, and in oreat BTitain ebrnaT 1G, 1926,

ThiS invention re]teS to StenoilS foI' uSe in dnplioating.

It iS in Some CaSes deSired to have in a Stencil re rodnCtion Signatnfo oI' otheI' nlatter produced in different ooloured ink fron fhat uSed in forming the body of tho Sfenci1 iInpfeSSion. To thiS end SonletiIneS fhe matter to be feproduced in a diffefent Colored ink iS out in t11e Sn1e stenoil Sheet aS the renainder of the II11tteI' pieoe of in1I)erlTleable InteIil iS Seonred to the back of the Stenoil and betvveen it and the inkih 1T1eans, a quontity of ink of the deSired col 01I' being infefpoSed betvveen fhe rear face lj of the Sfenoi1 and a Portion of the iT11(in1 penneable II1aferial Seoored thereto.

ThiS afrangeInent neooSSitates lifting the StenCil aTvay fron1 the stenoi1 corrier vvhen if iS deSired fo apply Inore ink foI 11Se in Te roduCing thiS portion of the Stenoi1 I'e prodHotion.

The obieot of the presont invention is to provide a device odapted fo Seol1re a SiTIlilar reSnlt Tvhich vvill be n1ore eSiIy Plaoed in position and inked.

Tho invention ConSiStS broadly in on atfaChnlent fo1' SfencilS o fapted to oonStitute a snbSidioTy or Huxiliary Stenoil oonlpriSing o Sheet of Tnaferial adHpted to be SteIloilized 0 and IneanS dpfed to aof aS a reSeTvoir foI ad Sn11 qnnfity of ink Seoured together in S11ch Inanner that the Sheet of Inaterio1 adpfed to be SfeIloiliZed and fhe ink oaTrier Inay be Secllre(i-in poSitioI1 on a Stenoi1 of the LlSIlal ohaoter.

In aocordance vith t}1e invontion the I'eS erVoiI' for the qHontity of in to be 11Sed in forIning the S nture or the like Inatter ny be oonStitllted bv a Shoet of forIni nous oI' poronS ntora1, in vVhioh oaSe the ^foraninoHS or poronS 1ateria1 1T1ay be in terpoSed betvveen the Sheet of sfenoiliZable nmferi1 and on inkjmpermeable baoking.

v here an ink-iTnperIneable baoking iS not rovided, the Inateria1 of the StenoiI Sheot Tifh hioh the atfaohTnent iS aSSooiteC1 Inoy operate fo prevont tho ink Supplied by the inking TneanS of the dup]ioator beooIning miXed With the ink pPHed fo the att Ch Inenf.

Ifor SeoUring the device in acoordonoo Tifh the invenfion to Stenoi1 Sheet of tho 1]S11al chHroCfer an HdheSive Inay be tlSe(l.

]]ere an ink-iTnPerIneoble boking iS rovided for t1e Inaterio1 funotioning as an ink reSe1'voiI' the adheSive IIloy be applied fo a portion of tho body of the baoking or to an extenSion forTned theTeon.

hefe the devioe oonlpriSeS an inkiInPer- Ineable backing, pieoe of porous oI' foroIni nollS n1ateriol, doPted to aot aS o feSorvoir for the ink, and a Stenoi1 Sheet 'the vvhole Inoy in effect TeSeInble a ninitnre ooTnbined Stencil sheet.

The lTlateria1 of vv}1ioh the stencil Sheet iS forned Inay be of any S11itable oharoter. It n1ay, foI' instanoe, be a SteI1oil Sheet adoPted fo be stenoilized by preSSure or Stenoil Sheet adapted to be stenoilized by the local appliction of a TI)edil1In dpfed to 1iqoefy the inkjmpermeable oompoSition used in fornling tho Stenoil Sheet.

ThnS in the one cose the Sfenoil Sheet Inay ConpriSe a Sheet ofyoShino poper or SiIni1r hig]ly ofous Inateria1 ooafed of iIn regnat ed vvith a Shellao coInpoSition, SIloh aS iS uSed in forIning So-calle(1 11to rphio StenCilS by the eITlployInent of filelofe,

vvheel-pen or the 1ike.

AlteTntive1y, the' SteI1cil Sheet of tfle do vice Iny ooInpriSe a Sheet of yoshino I)aper or SiTnilar highly poToUS ITlaterial ooted vvith vvax or vvith ge1atinied organio oo1- 10id, SIloh for inStanCe aS gelatine, oelh110Se esters or oellulose derivativeS vvith vvhioh are conveniently aSSooiated S11ifable ten1 ering or Softening gentS.

vhere the Stenoil Sheet is to be of tho ohrofer adapte fo be stenoiliZea by the ]ooal pp1ication of TnafeTio1 Capoble of 1iqnefyin oI' Soffening the in1reSiSting InediIn, the lafteI Inavy oonSiSt of Shellao or Solved by IneanS of o11Ifne bodieS llSed oS inkS in forIning the stenoiL lternative1v, gelatine or like oelatiniZing or nio oolloi(f adapfe to be liqllefie(1 by the IlSe of S11itablo liqllefying gentS Inay be nsed.

AS vvHl be linderstood, in Stenoilizing, the hrnShpen or like stonoi1izin IneonS vvin bo appIieddirPCtly to the SIIrfoe of the Sfen oi] Sheet vvhich vvhen the Stenoi] iS fn 11Se vil1 be in Confoot Tvith f ho ink TeServoir.

In soIne oSeS it my be deSirable to fom the Stenoilizing Inaferiol and to eInploy it in the Tnanner speded in Iny appHcation for B1 itih IetterS 1 tent }To- 1900 of 1925.

A deviCe in Coordanoe vvith fhe invenfiolo aS Wil1 be underStood, Wi11 bo app1ied to tho foce of the Inai11 stenoi1 sheet, tht is to Say the face Which contootS vvith the iII1preSSion feCeiving InaterioL and Tvhen it becoInes neceSSary to opply a further quantity of ink to thiS additional or SubSidiory Stenoil tho StenoiI Sheet vvhich it coII1pfiSeS Inoy be 1ift ed avvoy ond o sInaH quntity of ink opplied direcHy fo the ink reservoir.

If o suitable adheSive is I1sed this subsidiory StenCil nlay be detaohed from the moin Stencil Sheet and 8 different-SnbSidiory Sten cil Substituted and, as Tvin be onderstood, in soIne caSeS a device in occordance Tvith the invention nlay be of 11tility even in caseS Tvhere the Tvholo of the motter to be reprodnced is forITle(1 in ink of 8 4 iven colollr.

ThIlS, for eXaIn 1e, the devioe iS of uSe in repToducing, for inStance, forTn lettefs vhere a consideroble ProPoftion of the nlatter fo1 loWS a Standard forn1 vhereaS other ortionS ore Changed, aS viH be fhe caSe vhefe, for inStance, Stondard o enings and concluding I)oI'ti(ns of o- 1etter of ciroular ore en1P1oyed and it iS desifed to inclllde diff efent Inotfef of intereSt to (1iff eI'ent grouPS of cIIStoInefS in the intefvening oftion.

The essentiol dinlenSionS of the dovice v7ill vary according to requireInentS but in aH caSes the device vvi11 be deSigned to function E8 subSidio oI' onxiliory to the stenci1 Tvhich is osSoo1ted Tvith the stencil carrier of o do Hootor.

ono oonStruction in accordance Tvith the invention iS illuStrated by vvay of exanlple in the accom onying draWings, in Which 11figure 1 iS a seotion of the ouxiliary Sten o1 igure 2 iS o front elevntion thereof, and

igure 3 is an e1evation of Stencil of the standard size vith an auxiliary stencil atfohed.

In the dTvingS, 1 iS the sheet of Tnatefio1 odopbed to be ste11oi1ized, 2 iS o Sheet of o porons Inafefial adapted to funotion as an ink feSefvoir ond 3 iS on ink-iInperfneable booking, theSe thTee eleInents being secured together at Tvhile o 1ayer of odhesive iS aPPlied at 5 to the Tear Surface of the iIn permeable backin Referfing to Elgure 3 the main stenoH iS indicoted by the Tefefence 6, the anXiliary Stenoi1 being attached adiaoent to the foot thereof.

ffoving novv deScribed n1y invention, !vhnt I olaim aS new and deSire to Seoure by Let terS Potent is= 1. n attochnlent for Stenoils adapted to oonstitute o subsidiory or auxilial'y Stenoi com riSing a Sheet of materia1 adapted to be Stencilized ond IneonS ada ted to aot n3 reseTvoir foI' a SIna11qunntity of ink SeCured together olong one edge only in s11ch Inanne1' that the sheet of IIlateI ial adapted to be Sten ciHzed and fhe ink carrier may be Seoured in osition on a StenoiI of the uSua1 chnrnofer.

2. 11n ottachInent for Stenci1S adapfed fo ConStitute a Subsidiary or auxiliHry Ft( n( CoInpriSing a f1exible sfruofuro inohdin n Sheet of Inaterial adapted fo be stonoilizpr1 and a sheet of forHninous oI porous Inaterin Hda fed to aCf ns a roservoir foI 8 Sn] qHantity of ink Securo(1 together H1ong one edge only in Snch nanner thot the Sheet of naterinl adn ted fo be Stenoi1ized ond fhe ink Carrier Tlay be Seolll'ed in poSifio on n Stenci1 of the USnal characfer.

3. 11n attchnent fof StenciIS adopted fo constitute o SubSidiary ol' ouxi1iary SteCi1 com rising a Sheet of moterial adaptod to be SteIloilized, IneanS adapted fo aot oS a reSer voir for 1 Sn1all quantity of ink and an ink iInpefmeabe bocking connected together olong one edge only in suoh nlanner that the vhole Inay be Seoured in position on n Stenci1 of the nSua1 charaoter.

11n attaohInent foI StencilS adapted to constitute a subSidiory of auxiliory stenci1 ooln rising 8 Sheet of foraIninouS Tnate1n1 Coated Tvith nn ink-feSiSting nTedinn of n character adapfed to be 1iqueed by the looal opplication of I Stencilizing agent and moHS ada ted to act aS o feServoiI' for o Sn1o quantity of ink Secofed together in SHch manner that the Sheet of Inoterial adapted to be Stencilized and the ink oarfier Inay bo Seoufed in Position on a Stenoil of the I1Sal oharacter.

5. attaohInent for Sfenci1s adapted to oonStitute o- SubSidiary or auxiHary Stenon ooInp1'ising o sheet o foroIninouS Inatefia coated vvith an ink-resisting Inedi11111 of a character adaPted to be li(111efied by the 1oca1 apP1iotion of o Stenoilizing agent and o Sheet of foron1inouS of Pofous Inaterial faStoned together along one edge only so that the vvhole IIloy be secured to o Stenoil Sheet of the llSIla1 charocter.

6. 1^Ln ottochrnent for Stenci]S ada )ted to oonStifHte n SubSidiory or ouxiliory Stencil coIn )riSing o sheet of fornIninous Inoteria1 oooted vith an inkreSiStin Inedium of a ohoractef adapted to be1iqueed by the local application of o Stencilizing agent, n]enns adaPted to act aS o feServoir for n Sma11 qnonfity of ink and an ink-inperInoable backing fostened together H1ong one odge on1 in SnCH Innnnerfhnt thosheet of nateria1 ada ted fo be StenoiliZed, the ink cnrrier ond the ink-inl- Pernleable backingnny bo secnfed in oSition on a Stencil of fhe uSual charoctor.

In testinony vhereof I have signod ny naIne fo thiS S )ecification.

DAVID GESTETNEB. 

